The 0.75x full-frame reducer for the Askar Astrograph 65PHQ is a four-lens system. The 0.75x focal reducer gives the 65PHQ a focal length of 312 mm, resulting in a focal ratio of f/4.8.
With this reducer, you can effectively shorten the exposure time and significantly increase the field of view, providing more convenience and opportunities for deep-sky astrophotography. The backfocus has a common dimension of 55mm and is easily achievable with many standard adapters. The reducer has connection options of M54 and M48 on the camera side and an M58x0.75 thread on the telescope side. A filter thread (M48×0.75, 2") is integrated into the included M54-M48 adapter.
Scope of Delivery:
Products specifications
| Filter thread | 2" / M48 |
| Reduction: | 0,75x |
| Working distance from the camera thread | 65/55 mm (from M54/M48 thread) |
